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    <H1 CLASS="title">Multi-Character Filter</H1>
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<H2>Description</H2>

<P><A HREF="filter.html">Filter</A> which provides access to its controlled sequence or sequences several characters at a time. The difference between a Filter which is Multi-Character and one which is not is reflected in the specifications of the various Filter refinements. <I>See</I>, <I>e.g.</I>, <A HREF="input_filter.html">InputFilter</A> and <A HREF="output_filter.html">OutputFilter</A>.</P>

<H2>Refinement of</H2>

<P><A HREF="filter.html">Filter</A>.</P>

<A NAME="types"></A>
<H2>Associated Types</H2>

<P>Same as <A HREF="filter.html#types">Filter</A>, with the following additional requirements:</P>

<TABLE CELLPADDING="5" BORDER="1">
    <TR><TD>Category</TD><TD>A type convertible to <A HREF="../guide/traits.html#category_tags"><CODE>filter_tag</CODE></A> and to <A HREF="../guide/traits.html#category_tags"><CODE>multichar_tag</CODE></A></TD></TR>
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<A NAME="expressions"></A>
<H2>Valid Expressions / Semantics</H2>

<P>Same as <A HREF="filter.html">Filter</A>.</P>

<H2>Models</H2>

<UL>
    <LI>The compression and decompression Filters
    <LI><A HREF="../classes/regex_filter.html"><CODE>basic_regex_filter</CODE></A>
    <LI><A HREF="../classes/aggregate.html"><CODE>aggregate_filter</CODE></A>
    <LI><A HREF="../classes/symmetric_filter.html"><CODE>symmetric_filter</CODE></A>
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    Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at <A HREF="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>)
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